Nannaria hardeni, Means & Hennen & Marek, 2021

Means, Jackson C., Hennen, Derek A. & Marek, Paul E., 2021, A revision of the minor species group in the millipede genus Nannaria Chamberlin, 1918 (Diplopoda, Polydesmida, Xystodesmidae), ZooKeys 1030, pp. 1-180 : 1

Nannaria hardeni sp. nov. Figs 28 , 29 Vernacular name: "Curt Harden’s Twisted-Claw Millipede"

Material examined.

Holotype: United States - Virginia • ♂; Pittsylvania County, Angler's Park ; 36.5577°N, - 79.3515°W; elev. 134 m; 23 Dec. 2016; C. W. Harden leg.; VMNH MPE02278 .

Paratypes: United States - Virginia • 1 ♂; same collection data as holotype; VTEC MPE02282 • 1 ♂; same collection data as holotype; VMNH MPE02283 • 1 ♀; same collection data as holotype; VTEC MPE02279 • 1 ♀; same collection data as holotype; VMNH MPE02281 .

Other material.

United States - Virginia • 1 ♂; Henry County, vicinity of Figsboro ; 36.7861°N, - 79.8586°W; 9 Nov. 1980; R. Hoffman leg.; VMNH NAN0247 • 1 ♂; same collection data as preceding; 15 Nov. 1981; VMNH NAN0249 • 1 ♂; Henry County, Martinsville , VMNH; 36.6761°N, - 79.8771°W; 2 Nov. 1992; J. Anderson, VMNH surveys leg.; VMNH NAN0270 • 1 ♂; same collection data as preceding; Dec. 1997; VMNH NAN0271 • 1 ♂; same collection data as preceding; 19 Dec. 1996; VMNH survey leg.; VMNH NAN0273 • 1 ♂; Martinsville, VMNH on sidewalk to Annex ; 36.6761°N, - 79.8771°W; 12 Nov. 1992; J. Anderson leg.; VMNH NAN0272 • 1 ♂; Martinsville, Dundee Lane ; 36.6892°N, - 79.8727°W; 5 Jan. 1990; P. Carter leg.; VMNH NAN0274 • 1 ♂; near Martinsville, Dupont prop.; 36.6680°N, - 79.8922°W; 16 Oct. 1995; J. Anderson leg.; VMNH NAN0275 • 2 ♂♂; same collection data as preceding; 23 Oct. 1995; VMNH NAN0276 • 8 ♂♂; Pittsylvania County, Danville, Angler's Park ; 36.5500°N, - 79.3500°W; elev. 126 m; 29 Oct. 2017; hand collected; C. Harden leg.; VTEC MPE03734 -40, 4239 • 3 ♀♀; same collection data as preceding; VTEC MPE03741 -3 • 18 ♂♂; Pittsylvania County, Lacy Farm DF site, 3 mi. ENE of Axton ; 36.6760°N, - 79.6621°W; 29 Mar. 1992; VMNH survey leg.; VMNH NAN0245 • 8 ♂♂; same collection data as preceding; 21 Dec. 1992; VMNH NAN0246 • 10 ♂♂; same collection data as preceding; 23 Apr. 1992; VMNH NAN0248 • 2 ♂♂; same collection data as preceding; 15 May 1992; VMNH NAN0250 • 8 ♂♂; Lacy Farm , ca 5 mi. ENE of Axton, pitfall trap; 36.6870°N, - 79.6286°W; 13 May 1992; VMNH survey leg.; VMNH NAN0251 ; 28 ♂♂; Lacy Farm DF site, ca 4 mi. ENE of Axton ; 36.6815°N, - 79.6454°W; 13 Nov. 1992; VMNH survey leg.; VMNH NAN0252. For detailed collection data see Suppl. material 7 .

Diagnosis.

Adult males of Nannaria hardeni sp. nov. are distinct from other Nannaria and the nearby N. wilsoni , based on the following combination of characters: Gonopods. Gonopodal acropodite (Fig. 28 ) gently curving medially before apex, distal zone reduced, not laminate, curving caudally with flanges as in N. wilsoni or with lobed lateral flange as in N. monsdomia sp. nov. Telopodite basal zone height> 1/2 length of acropodite, not <1/4 length of acropodite as in N. wilsoni . Tip simple, directed medially, without lateral flange as in N. monsdomia sp. nov., and not directed caudally with lateral flange as in N. wilsoni . Prefemur with straight, acicular prefemoral process, not laminate, curving medially as in N. monsdomia sp. nov. or N. wilsoni . Prefemoral process not crossing acropodite as in N. wilsoni or N. monsdomia sp. nov. Prefemoral process length subequal to height of telopodite basal zone, not greater than height of telopodite basal zone as in N. monsdomia sp. nov. and N. wilsoni . Prefemoral spine widely separated from prefemoral process (Fig. 28A , red arrow) and sharp, tooth-like, not rounded as in N. monsdomia sp. nov. or lacking as in N. wilsoni . Color. Tergites with orange paranotal spots (Fig. 29 ). Dark brown background. Dorsum of collum smooth with orange margin.

Measurements.

♂ holotype (VMNH, MPE02278): BL = 17.3, CW = 2.5, IW = 1.6, ISW = 0.6, B11W = 2.9, B11H = 1.9; ♀ paratype (VMNH, MPE02281): BL = 17.6, CW = 2.1, IW = 1.8, ISW = 0.6, B11W = 2.9, B11H = 1.9.

Variation.

No known variation.

Distribution.

Known from southern Virginia, near the North Carolina border (Virginia: Henry and Pittsylvania counties; Suppl. material 7; Fig. 128 ). Distribution area: 374 km2; status: MRE.

Ecology.

Individuals of N. hardeni sp. nov. have been found in young, disturbed mesic hardwood forests under rocks, often in fern thickets. Interestingly, N. hardeni sp. nov. has also been collected from IPM sticky traps from inside the Virginia Museum of Natural History in Martinsville, Virginia.

Etymology.

This species is named after its collector, Curt W. Harden. The specific name is a genitive noun derived as a patronym.

Type locality.

United States, Virginia, Pittsylvania County, Angler’s Park, 36.5577°N, - 79.3515°W.

Figures

Figure 28. Nannaria hardeni sp. nov. holotype ♂ (VMNH, MPE 02278) left gonopod A anterior view; red arrow indicates wide separation between prefemoral process and prefemoral spine B medial view C posterior view. Scale bar: 0.5 mm.

Figure 29. Nannaria hardeni sp. nov. holotype ♂ (VMNH, MPE 02278) coloration. Scale bar: 4.0 mm.

Figure 128. Distribution map of Nannaria minor species group collection localities in the Eastern Piedmont and coast.